Free Shipping Offers are for Standard Ground Delivery service and are only valid for shipping addresses within the 48 Contiguous United States. Truck freight and oversize charges still apply unless otherwise notes and can only be shipped to the lower 48 States.Same Day Shipping (on most parts) if you order by 5PM EST on a business day. We ship via UPS Ground and/or USPS to all locations in the Continental 48 States.

Product Resources

Review & Installation Video

Review & Install Video

More Power. When adding power adders like nitrous, superchargers, or turbos to your Pony you need the correct spark plug to maximize horsepower. That is where Ford Racing "0-Degree" Spark Plugs come into play, these plugs are specifically designed for applications that require a one step colder heat range.

Legendary Ford Racing Performance. Add performance parts to your Pony made by the people who know it best. Ford Racing's legendary quality and performance ensure these 0-Degree Spark Plugs will deliver the consistent results you need to tune for maximum power.

Application. This set of eight (8) Ford Racing 0-Degree 16mm Spark Plugs are specifically designed as an upgrade for nitrous or force inducted 2005 to 2008 GT Mustangs with the stock 3 valve 4.6L modular engine.

Identifing Your Coils. Engines with late style 12MM spark plugs can be identified by coil engineering number 8L3E printed on the coils. Engines with early style 16mm "High Thread" design spark plugs can be identified by coil engineering number 3L3E.

Questions & Answers (7)

5 Top Rated Questions

Ok to run on n/a cars? Although these plugs are designed for forced induction are they ok to run on n/a cars as well?

These plugs are a colder plug meant for higher cylinder pressures. While it might run in your N/A engine, there is a possibility of missing under throttle or they simply might not make optimal horsepower.

No they are meant for a supercharged engine and not to be used as a plug upgrade for a n/a engine

How should I gap these to go with bolt on mods and a 75-100 shot of Nos? Or should I leave them like they come?

The Ford Performance 0-Degree Spark Plugs come pre gapped, but gap should always be checked on a plug before installing. With the modifications done to the car, gap may need to be adjusted to accommodate for the nitrous, slightly closing the gap unless aftermarket coils are installed.

No they are a colder plug designed for forced induction applications. American Muscle has other plugs that are up grades from stock that are designed for your application. Like the NGK G-Power Platinum Performance Spark Plugs item #64066.

QUite expensive spark plugs, but you really feel the difference between the this and the standard ones. A must have if you have a supercharger/turbocharger or a highly modified engine. You feel the difference just after the installation. Trust me!

I bought a used 2007 mustang gt with 103k miles on it. I knew it needed plugs when I bought it. They were horrific to replace.
These plugs made a big difference once I got them in. The vehicle started up a little faster and sounded much better.

AmericanMuscle Sweepstakes

Word on The Street

I can't begin to explain how great the whole experience with American Muscle was, from the information about the product which included a video installation guide, to the free one day shipping, the whole process was fantastic. You can tell then they really take pride in the way they run the site.

Meet Our Team

I got my first Mustang when I was 16, a two tone 91 GT red and silver with a sunroof that did not leak. And needless to say I was a bit timid to do work on it, I had not modified any vehicle before outside of installing a CD player. I got working with a friend that had a 95 GT at the time and star...